2026/05/09
Determining whether the bearings of a half-wet material crusher need replacement can be done quickly by listening, touching, measuring, and visually inspecting. This method is suitable for damp and dusty working conditions.
During operation, listen to the sound. A normal bearing will only produce a uniform, slight sound. If there is a continuous metallic friction sound, a clunking noise, a periodic screeching sound, or obvious noise under no-load, it indicates that the internal raceways and balls are worn and should be replaced immediately. Touch the bearing housing. A normal bearing should be slightly warm, not hot. If it remains hot, exceeding 70°C, and remains hot even after adding grease, it usually indicates that the bearing clearance is too large or that it is damaged and has failed.
After stopping the machine, manually rotate the rotor. Normal rotors rotate smoothly with good inertia. If they feel heavy, stuck, or obstructed, it indicates that the bearing raceways are damaged. Shake the shaft end or pulley. If there is obvious radial or axial play, the clearance is too large and the bearing must be replaced. Simultaneously observe the lubrication condition. If the grease is black, contains iron filings, or is clumpy, or if the bearing housing leaks or spits oil, it indicates severe internal wear.
If fertilizer produciton machine suddenly vibrates more and the machine shakes, after ruling out loose mounting feet and rotor imbalance, it is most likely a bearing failure. Semi-wet materials operate under harsh conditions and are prone to aging after 6 to 12 months of continuous use. If any two of the above symptoms appear, it is recommended to replace the bearing immediately to avoid seizing and burning out the shaft, causing greater losses.
